With flame-retardant coating that expands and closes honeycomb cells, PyroCide stops flames from spreading and eliminates air flow to propagate fire. It has more than 95% open area for minimum resistance to air flow within electronics cooling chassis. Unit is suited for telecom and datacom equipment designed to meet Telcordia NEBS standards. RoHS-compliant vent panel has ASTM E-84 Class A rating and can be used in ETSI cabinets.